Introduction: In the world, there are a lot of important materials that we use in our everyday lives. Aluminum is a major metal that has many uses and is very helpful in achieving things through the use of recycling. The purpose of this experiment was to show how aluminum undergoes many chemical reactions to produce Alum. Materials and Methods: When this recycling experiment was conducted, we first had to gather the essential material needed.
In performing these sets of experiments, in which we would drop a water/water solution onto the surface of a penny, we were trying to test and experiment the bonding qualities of water when made into a solution compared to when the water is pure. When we dropped pure tap water on to a penny, the water, instead of flowing and spreading out, stayed together in a single drop on the penny. We wanted to see how different substances affected this phenomenon. When we formulated our guiding question we made sure to preserve these intents in the language: how do foreign substances influence the bonding quality and strength (to the top of a zinc penny in specific) of water? Since these experiments were conducted in groups, we set up a few roles to
At noon on April 11th, 2016 my geology 101 lab class conducted a field study of two faults located on East Owens Ave (36.188378, -115.014308). The day was sunny with scattered clouds, but it had rained the day prior. These two faults are of particular importance due to their close proximity to surrounding neighborhoods. Our goal was to see how faults behave in the real world and draw conclusions on the public policy of Las Vegas concerning faults.
Minerals 1. The minerals under the DRI for my age group would be calcium, potassium, sodium, copper ,iron, magnesium, phosphorous, selenium, and zinc. The mineral that comes below the DRI would be be potassium. However, it is not more than 80% below the DRI. However I did have a low potassium intake.
Introduction: The purpose of this experiment is to demonstrate the different types of chemical reactions, those including Copper. There are different types of chemical reactions. A double displacement reaction is a chemical process involving the exchange of bonds between two reacting chemical species. A a decomposition reaction is the separation of a chemical compound into elements or simpler compounds and the single-displacement reaction is a type of
Oaths that are made by Knights are taken quite seriously and Knight’s will often die trying to fulfill them. “He would take his vengeance on this tyrant king” (Pg. 29). Theseus vows that he would avenge the women he witnessed crying over their husbands post mortem treatment. True to his word he raises an army and burns Thebes to the ground. “We must endure it, that’s the long and short” (Pg. 32).
The valence electrons in calcium do not experience as strong of an attraction to the nucleus as those in magnesium, because they are farther from the nucleus and are more shielded by other interior electrons. Additionally, the valence electrons in calcium have more potential energy than those in magnesium as a result of their being farther from the nucleus. It follows that when calcium loses two valence electrons, less energy (and time) is expended pulling them away from the nucleus than when the same occurs with magnesium. Also, more potential energy is released from calcium losing electrons than from when magnesium does. Thus more total energy and products of the reaction are released more quickly when calcium reacts with water than when
Typically atomic radius increases as the elements go down a family. As the elements go down a family, they generally have an increasing number of energy levels or shells which results in an increased distance from the nucleus which makes the atom larger. Since the energy level is increasing, the screening level also increases. This means that the electrons are blocked and are held more loosely than other electrons closer to the nucleus. This causes the atom to be larger.
Arsenopyrite was discovered by G. Agricola of Germany in 1546 (Reciprocal Net), it is a arsenic ore and has the chemical formula FeAsS, meaning it contains iron, arsenic, and sulfur. The molecular weight of it is 162.83 gm and contains about 34.30% Fe, 46.01% As, and 19.69% S as its main components (David B.). The general physical description of Arsenopyrite can be depicted as a light steel gray or tin white, opaque, and non-florescent . If formed as the crystal, the hardness of those crystals is a 5, having a distinct cleavage with striated, parallel lines and prismatic, slender crystals . The density of Arsenopyrite is 6.07 g/cm^3.
Elements that are arranged on the periodic table have a major impact on our everyday lives. In fact, every element has an important use. Many elements can be found in our bodies that are responsible for life functions, others have pioneered innovation and some are used in complex medical procedures. It is interesting to realize that chemistry surrounds us everyday. Holmium is an element that has had a positive impact on the lives of many people.
Electrochemistry is the study of reactions in which charged particles (ions or electrons) appear in two phases of matter, such as the metallic phase (the electrode) or aqueous phase (the electrolyte). (Lower 2004) These reactions involve the transfer of electric charges between the electrodes and the electrolyte. These cells have two electrodes which are named the anode and the cathode. The anode is the electrode where oxidation occurs and the cathode is the electrode where reduction occurs (Electrochemical cells 2014).
The periodic table is a much more interesting concept than people give it credit for. Periodic means the repeating according to some pattern. The first periodic table is very different from the modern one. They are both very interestingly organized. The periodic table has the elements on them.
They include: elements are fundamental building materials of matter and can be understood in terms of arrangements of atoms and they retain their identity in reactions; properties of materials can be explained by the structure of atoms and molecules; changes in matter involve the rearrangement of atoms and/or electrons; rates are determined by details of molecular collisions; thermodynamics describes the roles of energy and explain the direction of changes in matter; and equilibrium is sensitive to initial conditions and external perturbations. These goals are the 6 big ideas set forth by College Board for the AP Chemistry exam. The students need to be proficient in these 6 big ideas by the AP exam on May 7. The instructional goals for this unit cover several of the learning objectives for the first big idea (elements are fundamental building materials of matter and can be understood in terms of arrangements of atoms and they retain their identity in reactions) by students learning the electron arrangements of atoms, how those are interpreted on a PES graph and how those affect the periodic trends.
Background Research Without batteries there would be a lot of things we would not be able to use. Life would a lot more different and difficult because that also means no phones. Batteries are very helpful, they power flashlights, remotes for the television, and also cameras. Without them, there would not be any of these things so it is important that the best and longest lasting batteries can be found and used. People could be regularly buying a certain brand of batteries when there is another one sitting there which no one is buying when that brand is actually the best one.
The awareness of the inclusion of zinc in the management of childhood diarrhea among health care providers has been reported to be high in some developing countries. The use of zinc to treat diarrhea has the potential to avert up to an estimated 400,000 deaths annually and has been recommended for treatment of children with diarrhea in developing countries by UNICEF and WHO. A major concern is that ORT does not affect morbidity. Zinc has been found to reduce the duration and severity of diarrhea episodes and to lower incidence for the next two to three months [10]. WHO identified a number of management practices and these are breast feeding, Oral Rehydration Therapy (ORT) and weaning practices.
